difference of square of(21^2-20^2)
Answers
Answered by
3
Answer:
41
Step-by-step explanation:
txxtxxrcugixynuihigufuhov
Answered by
10
IT CAN BE DONE IN TWO METHODS
1st method from ch- "squares and square roots"
(21² - 20²)
= (21 + 20) ........ {the difference between (n+1) and n is (n+ n+1)}
= 41
2nd method from ch- "algebraic identities"
= (21²-20²)
= (21+20) (21-20)
= 41×1
= 41
hope it helps uu♥️♥️
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